package Circle;

public class Circle {
    double radius;

    public void setRadius(double r){
        radius = r;
    }
    public void Area(){
        System.out.println("面积为"+3.14159 * radius * radius);;
    }

    public void Circumference(){
        System.out.println("周长为"+3.14159 * 2 * radius); ;
    }
}
